Horizontal knife sheath



FIG. 1 is a front elevational view of a horizontal knife sheath, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view the left side being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a horizontal knife sheath, as shown and described. 